I am sorry that things aren't working out with your son right now. I can hear your frustration.
My only advice is to stick with it. It won't happen overnight. Since this is just Day 1 with pushing his naptime back, keep consistent with it for another week.
I didn't read the original post, so I am not sure how old your son is. But when my son was about 2 years old, he went from 2 naps to 1 nap. It took a few weeks for both of us to adjust to it. The first week was slowly adjusting the time from 1130am to 1pm (I think I moved it back about 30 minutes each day or so). The second week was him adjusting to the new time and not getting out of bed, crying/screaming, etc. Each time I would put him in his room, read a book or pet his back for a few minutes (like 5 minutes max), tuck him in, and leave the room. I have been doing this since he was about 4 months old so me leaving the room isn't much of an issue with him. But him getting out of bed during those transition times was an issue. I would just keep putting him back in his bed and leave the room with little to no reaction/talking from me. After about a week he stayed in there and slept peacefully.
Like I said before, it won't happen over night. But with more time and consistency on your part, it should work out.
So I just looked up your original post...If your son is as rambunctious and energetic as mine is, I would also suggest giving him more activities to keep his mind and body occupied during the morning before his nap. I know if I kept my son indoors all morning, he wouldn't nap at all at that age. But if I did a short activity with him in the morning that kept his brain occupied (like painting outside or sidewalk chalk or chasing bubbles) then took him for a long walk around the block (where he actually walked next to me) or to the park for about an hour before naptime, he went down with no problems.
I also had a newborn baby at the time so I knew he wasn't getting enough outside activity being home with me all day. So we enrolled him in preschool 2 mornings a week. Trust me, as soon as he got home from preschool at 12noon, he was READY for a nap. Most of the time he would fall asleep during the 10 minute ride home from school. Then the other three days I would make sure to take both the kids out to the park or other play area to let him burn off his energy. Then we went home for lunch and then a short nap on those days.
I would keep at it for a few weeks and see how it goes.
On the flip side, after trying it for a few weeks, if you have no success, it could be that he is just done with naps. My neighbors daughters both stopped taking naps around 2.5 years old. My son is now 3.5 and will still take a 2-3 hour nap midday if I let him. The only reason I don't is because when he does nap, he doesn't go to sleep at night until after 10pm and then he is messed up the following day.
Sorry for writing a book. Hope that your little adjusts soon and that you both find the right combination of a sleep schedule that works for you.